如何使用后退按钮配置Dialog

Question

I would like my Codename One Dialog to get disposed when the User presses on the hardware back button, how would I do that?

Dialog dialog = new Dialog("Hi");
dialog.add(new Label("World"));
dialog.show();

Answer 1

Use the setBackCommand() with an empty string Command: It is also recommended to use the setDisposeWhenPointerOutOfBounds for devices that does not have a back Button such as iOS

final Dialog dialog = new Dialog("Hi");
dialog.add(new Label("World"));
dialog.setBackCommand(new Command(""){

    @Override
    public void actionPerformed(ActionEvent evt) {
        dialog.dispose();
    }            
});
dialog.setDisposeWhenPointerOutOfBounds(true);
dialog.show();